Yup, it's three monitors. Somehow, my (one) computer's graphics card allows the use of the internal VGA input, too. One of my students has the same computer, managed to figure that one out, and helped me set it up--I would've had no idea.

Do you get a lot of use out of the vertical monitor? I find them neat but I'm not sure if I would use it.

“Everybody has a secret world inside of them. All of the people of the world, I mean everybody. No matter how dull and boring they are on the outside, inside
them they've all got unimaginable, magnificent, wonderful, stupid, amazing worlds. Not just one world. Hundreds of them. Thousands maybe.” -Neil Gaiman
~